Means for adjusting lens-mount straps.



c. M. HAYNES. MEANS FORADJUSTING LENS MOUNT STRAPS. AEPLICATION FILED AUG3I. 1916.

mmm Apr. 23, 1918.

CHARLES. lVI. HAYNES, 0F C-IILLICOTI-IE, OHIO.

MEANS FOR ADJUSIING LENS-MOUNT STRAPS.

Specification of Letters Patent.

Patented Apr. 23, 191%.

Application tiled August 31, 1916. Serial No. 117,842.

To all whom it may concern.'

Be it known that I, CHARLES M. IIAYNES, a citizen ot the United States, residing at Chillicothe, Ohio, have invented certain .new and useful Improvements in Means for Adjusting Lens-Mount Straps, of which the following is a full, clear, and exact description.

In mounting spectacle and eyeglass lenses in rimless frames it is frequently found that the straps that embrace the lens edges do not lit the latter, the space to receive the lens being too wide or too narrow. It is then necessary for the optician to compress or expand the straps. In doing so it is evident that he must be careful to keep the screw holes in alinement. My present invention relates to this operation, and its object is to provide simple and inexpensive means tor the purpose whereby the straps can be easily and quickly bent to fit the particular lens. To this and other ends the invention consists in the novel features and combinationsV hereinafter described.

One form of the invention is illustrated in the accompanying drawing, in which- Figure 1 is a perspective view of the preferred form of gage member.

Fig. 2 is a side view showing the gage member combined with a suitable pair of pliers, as used in accordance with my invention.

Fig. 3 is a detail view showing a lensmount with its straps compressed by the device shown in Fig. 2.

In its preferred iorm my invention involves the use ot a pair of pliers, say of the parallel-jaw type shown at 10. Vith the pliers I combine a gage member 11, consisting of a flat plate of metal 12 provided with side wings' 13. The device is slipped on one jaw of" the pliers, the said wings being spaced so as to embrace the sides ot the j aw rather snugly to prevent accidental displacement. It' the wings lit the jaw too loosely they can be bent toward each other slightly, by means of the pliers. rIhe plate 12 is long enough, and extends far enough above the wings, to extend slightly beyond the end ot the plier-jaw, as clearly shown in Fig. 2. A number of gage members (as many as may be necessary or desirable) are provided, with their plates 12 of different thicknesses, each corresponding to a standard. lens-thickness.

To explain the use of the device, it is assumed that (as is usually the case) the lensmount straps 14 are spaced too far apart to ht the particular lens, and hence must be bent toward each other. The optician then selects the gage member having a lens-plate ci" the same or slightly less thickness than the lens, and tits it to the plier-jaw as shown in Fig. 2. @ne strap of the lens-mount is then inserted between the lens-plate 12 and the inner iace of the jaw and the mount is pushed down as far as it will go, so that the end or' the lens-plate is at the bend of the strap. The plier-jaws are now brought firmly together. In this operation the straps are bent toward each other, but their approach is limited by the intervening lensplate. Then when the mounting is removed the straps will be found to be shaped somewhat as shown in Fig. 3, spaced apart the proper distance to receive the lens-edge and with the screw-holes 15 in alinement.

Sometimes the -optician iinds the straps too close together, for example in fitting new lenses to old mounts. In such case they can be forced onto the lens-plate 12; or, if too close together for that, they can be spread apart by prying with the side oi' a screwdriver or the back of a knife blade, etc. The operation above described then gives the straps the proper spacing and shape for the lens.

So far as my experience goes, the straps are always bent about equally; or at any rate such inequality as may exist has not been sufficient to put the screw holes appreciably out of alinement.

It is to be understood that the invention is not limited to the specific devices herein shown and described but can be embodied in other forms without departure from its spirit. l

I claim:

Means for adjusting lens-mount straps, comprising a pair of pliers, and a device consisting of a flat plate between the plierjaws having a pair of side wings movably embracing one of the aws, whereby the device is self-adjusting when used as described and is instantly removable to permit use oi the pliers in the ordinary way for other purposes.

In testimony whereof I hereunto affix my signature.

CHARLES M. HAYNES.

@enten et this patent may be obtained tor ve cents each, by addressing the Commissioner of @Pat-ents,

Washington, D. C. 

